Update phpstan/phpstan requirement from 2.1.50 to 2.1.51 (#231)

---
updated-dependencies:
- dependency-name: phpstan/phpstan
  dependency-version: 2.1.51
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Alessandro Lai <alessandro.lai85@gmail.com>

Author: dependabot[bot]

composer.json

@@ -34,7 +34,7 @@
         "symfony/phpunit-bridge": "^8.0",
         "symfony/routing": "^5.4 || ^6.0 || ^7.0 || ^8.0",
         "facile-it/facile-coding-standard": "1.4.1",
-        "phpstan/phpstan": "2.1.50",
+        "phpstan/phpstan": "2.1.51",
         "phpstan/extension-installer": "1.4.3",
         "jangregor/phpstan-prophecy": "2.3.0",
         "phpspec/prophecy": "^1.17",